Oversize Intake Valve Guide. Fits Twin Cam 2005-17 & Sportster 2005-2021. +.001in. Outside Diameter

Cast Iron: After chemically separating several samples of cast iron material , analysis and evaluating the test data, we decided to have our own specification of cast iron made exclusively , us. We specify elements such as carbon, silicon, manganese, nickel, chromium, copper and sulfur to produce a highly pearlitic structure with dense fine grains , excellent wear resistance.

* OD = 0.5630" (+0.001" Oversize)

* ID = 0.2750"

Matching Exhaust Guide # KPM-20-20701C

KPM Recommended Seal # KPM-71028-4